earticle

영어

In this paper, we propose spectrum sensing using cooperative relay to solve problem of sensing performance degradation due to CPE (Customer-Primise equipments) which causes low SNR (signal-to-noise ratio) problem. In cooperative communication systems, AF (amplify-and-forward) and DF (decoded-and-forward) is widely used for relay mechanism. Also, it is expected that a cooperative relay scheme guarantees a high sensing performance by its diversity gain. Based on these backgrounds, we applied a cooperative relay scheme to CR (cognitive radio) system, and simulation results show a sensing performance comparison between AF and DF.